Reorder + analyzer cleanup

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/Utils/src/VnDisposeable.cs b/lib/Utils/src/VnDisposeable.cs
new file mode 100644
index 0000000..4230a13
--- /dev/null
+++ b/lib/Utils/src/VnDisposeable.cs
@@ -0,0 +1,85 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Utils
+* File: VnDisposeable.cs 
+*
+* VnDisposeable.cs is part of VNLib.Utils which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Utils is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Utils is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Utils. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace VNLib.Utils
+{
+    /// <summary>
+    /// Provides a base class with abstract methods for for disposable objects, with disposed check method
+    /// </summary>
+    public abstract class VnDisposeable : IDisposable
+    {
+        ///<inheritdoc/>
+        protected bool Disposed { get; private set; }
+
+        /// <summary>
+        /// When overriden in a child class, is responsible for freeing resources
+        /// </summary>
+        protected abstract void Free();
+
+        /// <summary>
+        /// Checks if the current object has been disposed. Method will be inlined where possible
+        /// </summary>
+        /// <exception cref="ObjectDisposedException"></exception>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        protected virtual void Check()
+        {
+            if (Disposed)
+            {
+                throw new ObjectDisposedException("Object has been disposed");
+            }
+        }
+
+        /// <summary>
+        /// Sets the internal state to diposed without calling <see cref="Free"/> operation.
+        /// Usefull if another code-path performs the free operation independant of a dispose opreation.
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        protected void SetDisposedState() => Disposed = true;
+        ///<inheritdoc/>
+        protected virtual void Dispose(bool disposing)
+        {
+            if (!Disposed)
+            {
+                if (disposing)
+                {
+                    //Call free method
+                    Free();
+                }
+                Disposed = true;
+            }
+        }  
+        //Finalizer is not needed here
+
+        ///<inheritdoc/>
+        public void Dispose()
+        {
+            // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+            Dispose(disposing: true);
+            GC.SuppressFinalize(this);
+        }
+    }
+}
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